Sheet-metal roof



(No Model.)

A. WIGHTMAN.

SHEET METAL EooE.

No. 365,290. Patented June 21, 1887 PETERS. Fholo-Litlwgfipblr, Wilhinglon, ac

UNITED STATES ANDRE\V WIGHTMAN, OF PEEKSKILL, NE? YORK.

SHEET-METAL ROOF.

SPECIFICATION forming part of Letters Patent No. 365,290, dated June 21, 1887.

(No model.)

To aZZ whom, it may concern:

Be it known that I, ANDREW Wrenrnnn, of Peekskill, in the county of W'estchester and State of New York, have invented certain new and useful Improvements in Sheet-Metal Roofs; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such will enable others skilled in the art to which it pertains to make and use it, ref erence being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in sheet-metal roofs; and it consists in the combination of a series of diamond-shaped plates which are notched at their corners, and which are provided with two narrow folds underneath and two wide folds upon their tops, whereby the water is compelled to run away from the seams, instead of with them, and the points or corners are laid in a horizontal line across the roof, as will be more fully described hereinafter.

The object of my invention is to so con struct the plates that the water will not be drawn under them by means of suction, as is the case in many instances where no air-chambers are formed to counteract this defect.

Figure 1 shows a section of my roof-plates put together. Fig. 2 is a perspective of one of the plates straightened out perfectly flat. Figs. 3 and 4 are perspectives taken from opposite sides of the plates,showing them folded ready to be put together. Fig. 5 is a section of two or more plates taken on theline X X of Fig. 1. Fig. 6 is also a section taken on the line Y Y of Fig. 1.

A represents the metallic plates from which my roofing is formed, and which has its lower corner cut squarely across at B, and has all of its other corners cutout, as shown at C. In one of these cut-out corners G are formed the notches D, ofsnitable shape. By cutting away the metal at the lower corner the two narrow folds G 011 the under side of the plate can be turned under, as shown, without the lower corners approaching each other too closely. The notchesD allow the wide folds H to be turned over upon the top of the plate without any interference, and to make sharper corners than could be done i fthe metal were not out w away atthese points. By means of the notches D the two wide folds upon the tops of the plates can be made to lap sharply over each other, as shown.

\Vhen the edges H are turned over to form the two wide folds, the smaller projcclion between the two notches D serves to project out over the corner of the plate, and thus serves to close the opening or space which is left be tween the two adjacent ends of the fold H. By this construction the ends of the folds H can lap over each other a suitable distance, as shown in Fig. 4, without leaving the slightest space or opening through which the water can pass.

\Vhen the plates are placed in position upon the roof, their lower points stand in a horizontal line across the roof, thus causing the water to run away from the seams, instead of following them, as it would do if the seams extended in a straight line at right angles to caves and ridges. \Vhere there is a tendency of the water to follow thelines of the seams upon flat roofs, there is a tendency to draw the water under the plates or shingles by means of suction, unless an air-chamber is formed under them to counteract the suction. Kotching the corners of the plates allows a good water-tight roof to be made with very narrow folds underneath, whereby there is a considerable saving made in the size of the plates used.

Having thus described my invention, I claim A roofing plate having its lower corner cut away, as shown at B, and its three corners cut out, as shown at O, and one of the cut-out corners provided with notches D, and the two narrow folds formed upon the under side of the plate and the two wide folds upon its top, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

ANDREW WVIGHTMAN.

Vit-nesses:

EUGENE B. TRAVIS, Jonn SMITH, Jr. 

